Method of manufacturing toothbrush with needle-shaped bristles, and toothbrush manufactured by the same

Abstract

The present invention provides a method of manufacturing a toothbrush having needle-shaped bristles, and a toothbrush manufactured by the method. The toothbrush manufacturing method of the present invention includes the step of partially tapering ends of bristles, which are made of polyester and are set in a toothbrush body, through a physical grinding process, and the step of completing of a process of tapering the partially tapered bristles by immersing the partially tapered bristles in a chemical. The present invention makes it possible for toothbrush bristles to be tapered through a simple process. Furthermore, the present invention solves conventional difficulties occurring in tapering bristles after setting them in toothbrush bodies.

1 . A method of manufacturing a toothbrush comprising:
 partially tapering end portions of polyester bristles with a mechanical process;   setting the particularly tapered bristles in a toothbrush body; and   immersing the partially tapered end portions of polyester bristles in a chemical.   
     
     
         2 . The method of  claim 1 , the step of partially tapering comprising:
 grinding the polyester bristles such that an end point of the polyester bristles has a thickness ranging from 0.06 to 0.12 millimeters and such that the tapered end portion has a length ranging from 0.5 to 2.2 millimeters in length.   
     
     
         3 . The method of  claim 1 , the step of immersing comprising:
 immersing the partially tapered end portions of the polyester bristles in the chemical such that an end point of the bristle has a thickness ranging 0.01 to 0.03 millimeters and has the tapered end portion with a length ranging from 4 to 9 millimeters.   
     
     
         4 . The method of  claim 1 , the step of setting comprising:
 fastening the partially tapered bristles to a head part of the toothbrush body by an anchor.   
     
     
         5 . The method of  claim 4 , further comprising:
 folding the polyester bristles so as to form a long part and a short part, said long part having a length of between 3 to 4 millimeters greater than a length of said short part.   
     
     
         6 . The method of  claim 5 , the tapered end portions being on said long part, said short part having a round-shaped end. 
     
     
         7 . The method of  claim 1 , the step of setting comprising:
 fastening the polyester bristles to said toothbrush without an anchor.